It won grand champion at the All Japan Koi Show in 2017, and is the most expensive koi fish ever sold. Koi may just look like an oversized goldfish, but they're not even remotely related.
Mississippi paddlefish, Polyodon spathula, were being offered for sale at the Holland Koi Show — bizarre, filter feeding, cartilaginous living relics from the Cretaceous Period, 70 million years ago.
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